proof/pruf; pruːf/n 1 [C,U] something that proves something is true 证明﹔证据: +of proof of the existence of life on other planets 其他星球上有生命存在的证据proof of purchase/ownership/identity Do you have any proof of purchase (=something to prove that you have paid for something)? 你有什么购物证明吗?+(that) This letter is proof that he knew about the robbery. 这封信是证据﹐证明他知道这次抢劫。2 [C usually plural 一般用复数] technical a first copy of a printed page that you correct mistakes on【术语】校样